user1_info = {'first_name': 'He', 'last_name': 'Zhaobao',
              'age': 56, 'city': 'Yangxin'}
user2_info = {'first_name': 'Mao', 'last_name': 'Zedong',
              'age': 66, 'city': 'Xiangtan'}
user3_info = {'first_name': 'Zhou', 'last_name': 'Enlai',
              'age': 63, 'city': 'Huaian'}
people = [user1_info, user2_info, user3_info]
for user_info in people:
    for item in user_info:
        print(item + ': ' + str(user_info[item]))
        